/*
 * Copyright 2011 ArcBees Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.arcbees.server.auth;

import javax.servlet.http.Cookie;

import com.google.inject.Inject;
import com.google.inject.Provider;
import com.gwtplatform.dispatch.server.ExecutionContext;
import com.gwtplatform.dispatch.server.actionhandler.AbstractActionHandler;
import com.gwtplatform.dispatch.shared.ActionException;

/**
 * @author Christian Goudreau
 */
public class IsLoggedHandler extends AbstractActionHandler<IsLogged, GetResults<UserDto>> {
  private final Authenticator authentificator;
  private final Provider<UserDao> userDaoProvider;
  private final CookieUtilities cookieUtilities;

  @Inject
  IsLoggedHandler(final Authenticator authentificator,
      final CookieUtilities cookieUtilities, final Provider<UserDao> userDaoProvider) {
    super(IsLogged.class);
    
    this.authentificator = authentificator;
    this.userDaoProvider = userDaoProvider;
    this.cookieUtilities = cookieUtilities;
  }

  @Override
  public GetResults<UserDto> execute(IsLogged action, ExecutionContext context)
      throws ActionException {
    UserDao userDAO = userDaoProvider.get();

    Cookie cookieInRequest = cookieUtilities.getSessionCookie();

    // Check to see if we retrieved a cookie.
    if (cookieInRequest != null) {
      String userId = authentificator.isAuthenticated(cookieInRequest.getValue());
      
      if (userId!= null) {
        return new GetResults<UserDto>(userDAO.loadUserDto(userId));
      }
    } 
    
    return new GetResults<UserDto>(new UserDto());
  }
}
